The elytro-femoral stridulatory apparatus in Curculionidae (Coleoptera), with notes on the acoustic behaviour ofArniticus hylobioides(Boheman 1843) andErodiscus proximus(Viana 1959), and thanatosis display in the latter species

The elytro-femoral stridulatory apparatus of two species of Curculionidae is described and figured: Erodiscus proximus (Curculioninae: Erodiscini) and Arniticus hylobioides (Molytinae: Hylobiini). Notes on sound generation, acoustical behaviour and phylogenetic implications are given. Thanatosis display is reported for the first time in Erodiscus proximus.